That "head exploded because of music", reference from "Mars Attack" movie, too bad they're using a Japanese song, imagine if they're using Justin Bieber songs and all alien die because of it, it will be a hilarious.

The main group has already visited R'lyeh. Luhi-san is connected in some way to the Cthulhu corporation and may be a Star Spawn of Cthulhu. The takoyaki stand she runs has a Hello Kitty-style Cthulhu as a mascot.